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VulnerabilityPublished Updated

CVE-2025-37992: Linux kernel · net_sched: Flush gso_skb list too during ->change()

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 21:51 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 May 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

AI-suggested

A patch has been applied to the Linux kernel that introduces qdisc_dequeue_internal() to properly flush both the gso_skb list and the main skb queue during qdisc limit changes. Users should update to the fixed Linux kernel versions containing this patch. No other mitigation is indicated.

Description

A vulnerability in the Linux kernel's network scheduler (net_sched) was fixed where reducing a qdisc's limit during the ->change() operation did not properly flush the gso_skb list, potentially causing a NULL pointer dereference. The fix ensures both the gso_skb list and the main skb queue are flushed when trimming excess packets, preventing this issue.

References

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